Titanium-bearing blast-furnace slag is an important secondary resource. Artificial perovskite, with CaTiO as the main crystal phase, can be obtained after settling of the slag. Preparation of ferrotitanium alloy using perovskite as the titanium-containing material and aluminum as the reducing agent was studied. X-ray diffraction, scanning electron microscopy with energy-dispersive spectroscopy, and elemental chemical analysis were used to determine the composition and microstructure of the products. The results show that FeTi50 alloy can be prepared by aluminothermic reduction of perovskite. Reduction temperature has a strong influence on the separation of alloy and slag: when the reduction temperature increased from 1500 ℃ to 1600 ℃, the ferrotitanium alloy and slag effectively separated and Ti recovery exceeded 80%. The Al and O contents in the alloy decreased with decreasing aluminum addition, but also reduced Ti recovery. An alloy conforming to the industrial standard for FeTi50-A was obtained when the aluminum addition was 90 mass% of the stoichiometric value regarding reduction of perovskite.

中文翻译：

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钙钛矿铝热还原制备钛铁合金

含钛高炉渣是一种重要的二次资源。矿渣沉降后即可得到以CaTiO为主晶相的人造钙钛矿。研究了以钙钛矿为含钛材料、铝为还原剂制备钛铁合金。使用 X 射线衍射、扫描电子显微镜和能量色散光谱以及元素化学分析来确定产品的成分和微观结构。结果表明，钙钛矿铝热还原可以制备FeTi50合金。还原温度对合金与炉渣的分离有很大影响：当还原温度从1500℃提高到1600℃时，钛铁合金与炉渣有效分离，Ti回收率超过80%。合金中的Al和O含量随着铝添加量的减少而降低，但也降低了Ti的回收率。当铝添加量为钙钛矿还原化学计量值的90质量％时，得到符合FeTi50-A工业标准的合金。